Bock, MN 56313 Frost Dates
Frost dates for Bock, MN, ZIP 56313
Typically, the last spring freeze lands around 05/08, roughly 253 days out. The first fall frost typically arrives around 10/01, about 143 frost-free days later.
The USDA Plant Hardiness Zone Map puts Bock in Zone 4a (-30 to -25°F average annual minimum); frost dates are NOAA's 1991-2020 station normal, not this year's forecast.
What to do before the first frost
Zone 4a around Bock has about 5 weeks left before the first fall frost — that's the usual window to get a cold frame up if you want to keep harvesting past it.
Why 05/08 isn't a guarantee
05/08 is the middle of 30 years of NOAA records, not a promise. Plant by 04/25 and you're betting against frost in roughly 9 years out of 10. 05/26 is the safer bet, historically only a 1-in-10 chance of frost that late.
How Bock compares
At roughly 143 frost-free days, Bock places 36,678 of 40,283 ZIP codes in this dataset. Within MN, it ranks 689 of 943.
Learn more
local microclimates explains what one yard in Bock can differ from the 56313 normal, and zone vs. frost date explains why Zone 4a and Bock's frost date answer different questions.